/**
 * MIT License
 * 
 * Copyright (c) 2024 - present @ ebraid
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <stdint.h>
#include <string.h>
#include <types.h>


/**
 * @brief Add the first n characters of the string referred to by src to the end of the 
 *        string referred to by dest, and overwrite the '\ 0' at the end of the string 
 *        referred to by dest to achieve string concatenation.
 * @param dst:  Destination memory address
 * @param src:  Pointer to string
 * @param src_len: The length of the string to be added
 * @return Pointer to dest
*/
char * strncat(char * dst, const char * src, size_t src_len)
{
    char * tmp = dst;
    while(*dst != '\0') {
        dst++;
    }

    while(src_len != 0 && *src != '\0') {
        src_len--;
        *dst++ = *src++;
    }
    *dst = '\0';

    return tmp;
}
